#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author:Taotie Ren
import logging

# 禁用日志模块
# logging.disable(logging.CRITICAL)
logging.basicConfig(level=logging.DEBUG, format=' %(asctime)s - %(levelname)s - %(message)s')

logging.debug('Start of program')


def factorial(n):
	logging.debug('Start of factorial(%s)' % (n))
	total = 1
	for i in range(n + 1):
		# for i in range(1, n + 1):
		total *= i
		logging.debug('i is ' + str(i) + ', total is ' + str(total))
	logging.debug('End of factorial(%s)' % (n))
	return total


print(factorial(5))
logging.debug('End of program')

